Phoenix weather: Fall storm headed our way

PHOENIX -- After a cool start in the 60s and 70s, the Valley will warm to about 103 degrees this afternoon under sunny skies. That's about 5 degrees above average for this time of year, and we'll likely be just as warm again tomorrow.

High pressure building over our region will bring warm conditions through the end of this week, but a Pacific storm system will bring an abrupt weather pattern change this weekend.

Rain chances begin across the state Friday, and we could see rain in the Valley as early as Friday evening. Storm chances increase on Saturday and temperatures drop. Rain and even thunderstorms are possible Saturday and Saturday night. Gusty winds are expected Saturday and afternoon highs will top out in the low to mid 90s.

The low pressure system moves out Sunday, but cool air lingers.

Look for highs near 90 degrees Sunday through the middle of next week, with overnight lows in the 60s and 70s.